# -*- coding: utf-8 -*-
from __future__ import absolute_import

import logging
import os

from pip import cmdoptions
from pip.basecommand import RequirementCommand
from pip.cache import WheelCache
from pip.exceptions import CommandError, PreviousBuildDirError
from pip.operations.prepare import RequirementPreparer
from pip.req import RequirementSet
from pip.resolve import Resolver
from pip.utils import import_or_raise
from pip.utils.temp_dir import TempDirectory
from pip.wheel import WheelBuilder

logger = logging.getLogger(__name__)


class WheelCommand(RequirementCommand):
    """
    Build Wheel archives for your requirements and dependencies.

    Wheel is a built-package format, and offers the advantage of not
    recompiling your software during every install. For more details, see the
    wheel docs: https://wheel.readthedocs.io/en/latest/

    Requirements: setuptools>=0.8, and wheel.

    'pip wheel' uses the bdist_wheel setuptools extension from the wheel
    package to build individual wheels.

    """

    name = 'wheel'
    usage = """
      %prog [options] <requirement specifier> ...
      %prog [options] -r <requirements file> ...
      %prog [options] [-e] <vcs project url> ...
      %prog [options] [-e] <local project path> ...
      %prog [options] <archive url/path> ..."""

    summary = 'Build wheels from your requirements.'

    def __init__(self, *args, **kw):
        super(WheelCommand, self).__init__(*args, **kw)

        cmd_opts = self.cmd_opts

        cmd_opts.add_option(
            '-w', '--wheel-dir',
            dest='wheel_dir',
            metavar='dir',
            default=os.curdir,
            help=("Build wheels into <dir>, where the default is the "
                  "current working directory."),
        )
        cmd_opts.add_option(cmdoptions.no_binary())
        cmd_opts.add_option(cmdoptions.only_binary())
        cmd_opts.add_option(
            '--build-option',
            dest='build_options',
            metavar='options',
            action='append',
            help="Extra arguments to be supplied to 'setup.py bdist_wheel'.")
        cmd_opts.add_option(cmdoptions.constraints())
        cmd_opts.add_option(cmdoptions.editable())
        cmd_opts.add_option(cmdoptions.requirements())
        cmd_opts.add_option(cmdoptions.src())
        cmd_opts.add_option(cmdoptions.ignore_requires_python())
        cmd_opts.add_option(cmdoptions.no_deps())
        cmd_opts.add_option(cmdoptions.build_dir())
        cmd_opts.add_option(cmdoptions.progress_bar())

        cmd_opts.add_option(
            '--global-option',
            dest='global_options',
            action='append',
            metavar='options',
            help="Extra global options to be supplied to the setup.py "
            "call before the 'bdist_wheel' command.")

        cmd_opts.add_option(
            '--pre',
            action='store_true',
            default=False,
            help=("Include pre-release and development versions. By default, "
                  "pip only finds stable versions."),
        )

        cmd_opts.add_option(cmdoptions.no_clean())
        cmd_opts.add_option(cmdoptions.require_hashes())

        index_opts = cmdoptions.make_option_group(
            cmdoptions.index_group,
            self.parser,
        )

        self.parser.insert_option_group(0, index_opts)
        self.parser.insert_option_group(0, cmd_opts)

    def check_required_packages(self):
        import_or_raise(
            'wheel.bdist_wheel',
            CommandError,
            "'pip wheel' requires the 'wheel' package. To fix this, run: "
            "pip install wheel"
        )

        need_setuptools_message = (
            "'pip wheel' requires setuptools >= 0.8 for dist-info support. "
            "To fix this, run: pip install --upgrade setuptools>=0.8"
        )
        pkg_resources = import_or_raise(
            'pkg_resources',
            CommandError,
            need_setuptools_message
        )
        if not hasattr(pkg_resources, 'DistInfoDistribution'):
            raise CommandError(need_setuptools_message)

    def run(self, options, args):
        self.check_required_packages()
        cmdoptions.check_install_build_global(options)

        index_urls = [options.index_url] + options.extra_index_urls
        if options.no_index:
            logger.debug('Ignoring indexes: %s', ','.join(index_urls))
            index_urls = []

        if options.build_dir:
            options.build_dir = os.path.abspath(options.build_dir)

        options.src_dir = os.path.abspath(options.src_dir)

        with self._build_session(options) as session:
            finder = self._build_package_finder(options, session)
            build_delete = (not (options.no_clean or options.build_dir))
            wheel_cache = WheelCache(options.cache_dir, options.format_control)

            with TempDirectory(
                options.build_dir, delete=build_delete, kind="wheel"
            ) as directory:
                requirement_set = RequirementSet(
                    require_hashes=options.require_hashes,
                )

                self.populate_requirement_set(
                    requirement_set, args, options, finder, session, self.name,
                    wheel_cache
                )

                preparer = RequirementPreparer(
                    build_dir=directory.path,
                    src_dir=options.src_dir,
                    download_dir=None,
                    wheel_download_dir=options.wheel_dir,
                    progress_bar=options.progress_bar,
                )

                resolver = Resolver(
                    preparer=preparer,
                    finder=finder,
                    session=session,
                    wheel_cache=wheel_cache,
                    use_user_site=False,
                    upgrade_strategy="to-satisfy-only",
                    force_reinstall=False,
                    ignore_dependencies=options.ignore_dependencies,
                    ignore_requires_python=options.ignore_requires_python,
                    ignore_installed=True,
                    isolated=options.isolated_mode,
                )
                resolver.resolve(requirement_set)

                try:
                    # build wheels
                    wb = WheelBuilder(
                        requirement_set,
                        finder,
                        preparer,
                        wheel_cache,
                        build_options=options.build_options or [],
                        global_options=options.global_options or [],
                        no_clean=options.no_clean,
                    )
                    wheels_built_successfully = wb.build(session=session)
                    if not wheels_built_successfully:
                        raise CommandError(
                            "Failed to build one or more wheels"
                        )
                except PreviousBuildDirError:
                    options.no_clean = True
                    raise
                finally:
                    if not options.no_clean:
                        requirement_set.cleanup_files()
